stream.h

00001 /*
00002  * libopenraw - stream.h
00003  *
00004  * Copyright (C) 2006 Hubert Figuière
00005  *
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * This library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with this library; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
00019  */
00020 
00021 
00022 #ifndef __IO_STREAM_H__
00023 #define __IO_STREAM_H__
00024 
00025 #include <sys/types.h>
00026 #include <unistd.h>
00027 
00028 #include <string>
00029 
00030 #include <libopenraw/libopenraw.h>
00031 
00032 #include "exception.h"
00033 
00034 namespace OpenRaw {
00035     namespace IO {
00036         
00040         class Stream
00041         {
00042         public:
00046             Stream(const char *filename);
00047             virtual ~Stream();
00048             
00052             typedef ::or_error Error;
00053             
00054 // file APIs
00056             virtual Error open() = 0;
00058             virtual int close() = 0;
00060             virtual int seek(off_t offset, int whence) = 0;
00062             virtual int read(void *buf, size_t count) = 0;
00063             virtual off_t filesize() = 0;
00064 //          virtual void *mmap(size_t l, off_t offset) = 0;
00065 //          virtual int munmap(void *addr, size_t l) = 0;
00066             
00067             Error get_error()
00068                 {
00069                     return m_error;
00070                 }
00071 
00073             const std::string &get_path() const
00074                 {
00075                     return m_fileName;
00076                 }
00077 
00078             uint8_t readByte() throw(Internals::IOException);
00079         protected:
00080             void set_error(Error error)
00081                 {
00082                     m_error = error;
00083                 }
00084 
00085         private:
00087             Stream(const Stream& f);
00089             Stream & operator=(const Stream&);
00090             
00092             std::string m_fileName;
00093             Error m_error;
00094         };
00095 
00096     }
00097 }
00098 
00099 
00100 #endif

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